面积高程积分值计算方法的比较  

Comparison of hypsometric integral methods

作　　者：常直杨[1] 王建[1,2] 白世彪[1,2] 张志刚[1] 

机构地区：[1]南京师范大学地理科学学院,南京210023 [2]南京师范大学虚拟地理环境教育部重点实验室,南京210023

出　　处：《干旱区资源与环境》2015年第3期171-175,共5页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(40871010);江苏省高校优势学科建设工程项目(PAPD)资助

摘　　要：面积高程积分值(Hypsometric index)能够对流域地貌发育阶段进行定量的描述,在地貌学中得到了广泛的应用。关于该值的计算方法较多,然而,在实际应用中,哪种方法才能带来更便捷准确的结果,尚缺乏探讨。文中基于Arcgis9.3及SRTM-DEM数据,以白龙江流域32个子流域为例,分别利用积分曲线法、体积比例法及起伏比法求取了各子流域的HI值。结果表明:三种方法计算的HI值几乎一致,但起伏比法是计算HI值最高效简捷的方法;积分曲线法及体积比例法在流域数目较少时可以使用,但流域数目较多时不推荐使用。该结果可为利用HI值进行地貌研究提供借鉴。Hypsometric curve and hypsometric index have been widely used in geomorphology for their quantitative representation of the development of river drainages. There are many methods to calculate the two geomorphic indexes,but it still need to discuss which method will be the best. It is summarized that method of integral curve,method of elevation- relief ratio and method of volume- ratio are the three main methods. We did some works on 32 sub- basins of Bailong River basin,and concluded that the results of this three methods are nearly the same,but elevation- relief method is accurate,less cumbersome and easy to calculate with GIS environment. When we want to describe the hypsometric curves of basins,we can use the development tools,this method is not the best to calculate hypsometric index when there are many basins need to be calculated. Although volume- ratio method has the same results as the other two methods＇,we do not recommend this method for its time- consuming.

关 键 词：面积高程积分值 数字高程模型 起伏比法 白龙江流域 

分 类 号：P931[天文地球—自然地理学]